diff --git a/contrib/plugins/lockstep.c b/contrib/plugins/lockstep.c
index e36f0b9562..3614c3564c 100644
--- a/contrib/plugins/lockstep.c
+++ b/contrib/plugins/lockstep.c
@@ -130,7 +130,7 @@ static void report_divergance(ExecState *us, ExecState *them)
         }
     }
     divergence_log = g_slist_prepend(divergence_log,
-                                     g_memdup(&divrec, sizeof(divrec)));
+                                     g_memdup2(&divrec, sizeof(divrec)));
 
     /* Output short log entry of going out of sync... */
     if (verbose || divrec.distance == 1 || diverged) {